Mounting for rock drills



July 26, 1932. R. H. WILHELM MOUNTING FOR ROCK DRILLS Filed Dec. 24. 1930 INVENTOR. V lHm'Uze/m.

Hi5 A TTORNEY.

Patented July 26, 1932 UNITED STATES RUSSELL H. WILHELM, OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND PATENT OFFICE COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY MOUNTING non nocx DRILLS Application filed December 24, 1930. Serial: No. 504,522.

This invention relates to mountings, but more particularly to a mounting for rock drills of the hand held type.

One object of the invention is to enable cordance with the practice of the invention and illustrating the manner in which itmay be applied to a hand held rock drill and a shell which forms a support for the mount Figure 2 is a transverse view taken through Figure 1 on the line 22 looking in the direction indicated by the arrows, and

Figure 3 is a sectional plan 'view taken through Figure 1 on the line 3-3 looking in the direction indicated by the arro a Referring to the drawing and at first more particularly to Figure 1, A represents a rock drill of the hand held type comprising a cylinder B, a front head C and a back head D. These parts serve as a casing vfor the rock drill and are clamped securely together by side bolts E. In the back head i D are apertures F through'which the side bolts E extend and the front head 0 is provided with 40 ears G having apertures H to accommodate the side bolts E. c I

In accordance with the usual practice the front head G acts as a guide for a drill steel J, and on the front head C isa steel retainer K having a yoke L which may partly encired with a handle P comprisinga pair of rear ward extensions Q which may be integral portions of the back head D. Between the rear ends of the extensions Q, is a grip p01'- 7 tion R which, when the drillis being hand i riage's having on opposite sides thereof lon r vgitud nally extendingguide ribs T adapted to slide within guideways U of a rock drill shell V, such asis commonly employed for gu dlng and supporting rock drills of the drifter type with respect to the work. i The shell V has a cone W for cooperationwith a suitable clamping device (not shown) whereby the shell may be clamped to a supporting column or bar. I I Near the front end of the carriage S and disposed on opposite sides thereof are guide lugs X so spaced with respect to each other as to enable the ears G of the front head 0 to lie therebetween. The free ends of the lugs X are in the form of introverted hooks Y which overlie the ears G. The space. defined by the lugs X and the hook portions Y is preferably somewhat larger than the portion of the front head C which it accommodates so that the ears may be readily disposed between the lugs during the operation of placing the drill A upon thecarriage S. i

In order to assure the correct position of the rock drill A with respect'to the carriage S during the time the rock drill is being actu ated in the direction ofthe work, the car:

riage S is provided at its rear end with a cross member Z having agroove 37 therein adaptedto accommodate the grip portion R. The cross memberZ is preferably provided with an integral hook 0 which overlies the grip member R to assure against accidental displacement of said grip member from the groove 5. The cross member Z as arranged acts as an abutment for the drill A and serves to prevent endwise movement of the drill A with respect to the carriage S during the time the drill A is being actuated towards the work.

In order to assure simultaneous withdrawal of the rock drill A and the carriage S the back head D is provided with a hook (Z which extends into the shell V and has an inclined surface 0 adapted to engage a similar surface f of a rib g forming a part of the carriage S, and in this instance lying beneath the cylinder B. The rib g is, however, so located that the rock drill A is capable of limited degree of movement in a forwardly direction on the carriage S before bringing the hook (Z into engagement with the rib 9.

To the end that the carriage S, together with the rock drill A, may be conveniently actuated longitudinally of the shell V, the cross member Z is provided with an aperture h" to receive a feed nut 7' having a head which seats against one end of the cross member Z'. On one end of the feed nut j is a collar which seats against the cross member Z and the other end of said feed nut is eXtern'a-lly threaded to accommodate a nut 0 whereby the feed nut j may be clamped fixedly' in the cross member Z; The feed nut is internally threaded for the accommodation of a feed screw p journalled with its front end 9 in a bearing block 7* secured to the shell V. The opposite or rear end of the feed screw p may be similarly supported and. may be provided with a crank'handle (not shown), such as is commonly used for rotating the feed screw'to actuate the rock drill longitudinally of the shell.

The carriage S may be provided with additional abutment means at its front end, such as an. extension 8, having lugs 25 which lie in the path of the ears G and with re spect to which said lugs are spaced about the same distance as that distance normally existing between the inclined surfaces 6 and In practice, assuming the carriage S to be in the proper assembled position in the shell V, the rock drill A may be placed upon the carriage S with the front head lying be tween. the lugs X. By raising the rear end of the rock drill and sliding said rock drill in a forwardly direction the grip member R will pass over the cross member Z and the ears G'Wl'll enter the space between the lugs X. The rock d'ill A may then be moved forwardly with respect to the carriage S until the gripmember R reaches a position from which it may be lowered past the hook c. Thereafter the grip member R- may be dropped intothe groove 6 and the entire apparatus will be in readiness for use for drifting purposes.

Upon setting the hammer drill A in operation to direct the blows of the percussive element of the rock drill against the drill steel J the feed screw 2) may be rotated in the usual manner to actuate the carriage S and the rock drill A in the direction of the work. Upon completion of a drill hole or whenever it becomes necessary to change drill steels the feed screw p may be turned in an opposite direction.

It is conceivable that under some conditions of drilling the rock drill A, together with the drill steel J, will be readily retracted by the carriage S without necessitating the shifting of the: rock drill from the position which it occupies during the feeding movement. In theevent however that friction between the wall of the drill hole and the drill steel J is sufficiently: great to resist the retractive movement of the rock drill A, the carriage S may be retracted independently ofthe rock drill until the rib g engages the hook (Z and the lugs I; engage with the ears Gr. The-entire'apparatus may then be moved rearwardly on the shell V.

After the drill steel J has been changed the feed screw 79 may again be rotated to advance the carriage S and the rock drill A. This forward movement of the carriage S will move the cross member Z into abuttingposition against the grip-member R and the ears G will then he between'the lugsX where-- by the front portion of the drill will be held in approximate alignment with the drill steel J.

The present invention has been found to be extremely desirable in connection with drilling apparatus such as that described. '1

This is due to the fact that the carriage S as constructed comprises only a single piece which willefiiciently guide a hand held drillduring its use as a drifter without necessitating the use of a multiplicity of clamping devices to secure-the rock drill to the carriage.

I claim:

1. A mounting for a rock drill, comprising in combination with a rock drill casing and a handle thereon, a saddle to support the drill, guide lugs on the saddle to loosely engage the casing, an abutment ,on the carriage having a groove to receivethe handle and acting against the handleto prevent endwise movement of the rock drill in one direction with respect to the carriage, a rib on the saddle, and a hook on the casing adapted to engage the rib for limiting movement of the rock drill with respect to the casing'in an opposite direction.

2. A mounting for a rock drill, comprising in combination with a rock drill casing and a handle thereon, a saddle to support the drill, guide lugs on the saddle to loosely engage the casing, an abutment on the car'- specification.

RUSSELL H. WILHELM. 

